iText layout.jar Source Code

layout.jar is a component in iText Java library to provide layout functionalities. iText Java library allows you to generate and manage PDF documents.

The Source Code files are provided together with the JAR file in the binary packge like iText7-Core-7.1.4.zip. You can download it at iText 7 Core Download site.

You can compile it to generate your JAR file, using layout.pom as the build configuration file.

The source code of layout-7.1.4.jar is provided below:

✍: FYIcenter.com

com/itextpdf/layout/hyphenation/CharVector.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.itextpdf.layout.hyphenation;

import java.io.Serializable;

/**
 * <p>This class implements a simple char vector with access to the
 * underlying array.</p>
 *
 * <p>This work was authored by Carlos Villegas (cav@uniscope.co.jp).</p>
 */
public class CharVector implements Serializable {

    private static final long serialVersionUID = 4263472982169004048L;

    /**
     * Capacity increment size
     */
    private static final int DEFAULT_BLOCK_SIZE = 2048;
    private int blockSize;

    /**
     * The encapsulated array
     */
    private char[] array;

    /**
     * Points to next free item
     */
    private int n;

    /**
     * Construct char vector instance with default block size.
     */
    public CharVector() {
        this(DEFAULT_BLOCK_SIZE);
    }

    /**
     * Construct char vector instance.
     * @param capacity initial block size
     */
    public CharVector(int capacity) {
        if (capacity > 0) {
            blockSize = capacity;
        } else {
            blockSize = DEFAULT_BLOCK_SIZE;
        }
        array = new char[blockSize];
        n = 0;
    }

    /**
     * Construct char vector instance.
     * @param a char array to use
     */
    public CharVector(char[] a) {
        blockSize = DEFAULT_BLOCK_SIZE;
        array = a;
        n = a.length;
    }

    /**
     * Construct char vector instance.
     * @param a char array to use
     * @param capacity initial block size
     */
    public CharVector(char[] a, int capacity) {
        if (capacity > 0) {
            blockSize = capacity;
        } else {
            blockSize = DEFAULT_BLOCK_SIZE;
        }
        array = a;
        n = a.length;
    }

    /**
     * Copy constructor
     * @param cv the CharVector that should be cloned
     */
    public CharVector(CharVector cv) {
        this.array = (char[])cv.array.clone();
        this.blockSize = cv.blockSize;
        this.n = cv.n;
    }

    /**
     * Reset length of vector, but don't clear contents.
     */
    public void clear() {
        n = 0;
    }

    /**
     * Obtain char vector array.
     * @return char array
     */
    public char[] getArray() {
        return array;
    }

    /**
     * Obtain number of items in array.
     * @return number of items
     */
    public int length() {
        return n;
    }

    /**
     * Obtain capacity of array.
     * @return current capacity of array
     */
    public int capacity() {
        return array.length;
    }

    /**
     * Pet char at index.
     * @param index the index
     * @param val a char
     */
    public void put(int index, char val) {
        array[index] = val;
    }

    /**
     * Get char at index.
     * @param index the index
     * @return a char
     */
    public char get(int index) {
        return array[index];
    }

    /**
     * This is to implement memory allocation in the array. Like malloc().
     * @param size to allocate
     * @return previous length
     */
    public int alloc(int size) {
        int index = n;
        int len = array.length;
        if (n + size >= len) {
            char[] aux = new char[len + blockSize];
            System.arraycopy(array, 0, aux, 0, len);
            array = aux;
        }
        n += size;
        return index;
    }

    /**
     * Trim char vector to current length.
     */
    public void trimToSize() {
        if (n < array.length) {
            char[] aux = new char[n];
            System.arraycopy(array, 0, aux, 0, n);
            array = aux;
        }
    }
}

com/itextpdf/layout/hyphenation/CharVector.java

 

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2021-07-03, 9215👍, 0💬